Dye laser

Abstract

There is herein, disclosed a dye laser including a container for a dye solution and a pumping energy source coupled thereto, said dye solution containing a perimidone dye formula (I): <IMAGE> wherein R1 is a hydrogen atom, an alkyl group, a trifluoromethyl group, an alkoxycarbonyl group, an alkoxycarbonylalkyl group, an aralkyl group or a phenyl group; R2 is an optionally substituted alkoxycarbonyl group, a cyclohexyloxycarbonyl group, tetrahydrofurfuryloxycarbonyl group, an aryloxycarbonyl group, a benzyloxycarbonyl group, an acyl group, a cyano group or an optionally substituted carbamoyl group; R3 and R4 which may be the same or different are each a hydrogen atom, an alkyl group, an alkoxyalkyl group, an aralkyl group or an aryl group.

What is claimed is: 
     
       1. A dye laser including a container for a dye solution and a pumping energy source coupled thereto, said dye solution containing a perimidone dye of formula (I): ##STR30## wherein R 1  is a hydrogen atom, an alkyl group, a trifluoromethyl group, an alkoxycarbonyl group, an alkoxycarbonylalkyl group, an aralkyl group or a phenyl group; R 2  is an optionally substituted alkoxycarbonyl group, a cyclohexyloxycarbonyl group, tetrahydrofurfuryloxycarbonyl group, an aryloxycarbonyl group, a benzyloxycarbonyl group, an acyl group, a cyano group or an optionally substituted carbamoyl group; R 3  and R 4  which may be the same or different are each a hydrogen atom, an alkyl group, an alkoxyalkyl group, an aralkyl group or an aryl group. 
     
     
       2. A dye laser according to claim 1 wherein the dye solution contains 10 31  1 to 10 -4  mols of the perimidone dye per liter. 
     
     
       3. A dye laser according to claim 1 which has an oscillating wavelength range of 500 to 550 nm. 
     
     
       4. A dye solution for use in conjunction with a dye laser, said solution consisting essentially of a dye and a solvent therefore, said dye being of the formula (I): ##STR31## wherein R 1  is a hydrogen atom, an alkyl group, a trifluoromethyl group, an alkoxycarbonyl group, an alkoxycarbonylalkl group, an aralkyl group or a phenyl group; R 2  is an optionally substituted alkoxycarbonyl group, a cyclohexyloxycarbonyl group, tetrahydrofurfuryloxycarbonyl group, an aryloxycarbonyl group, a benzyloxycarbonyl group, an acyl group, a cyano group or an optionally substituted carbamoyl group; R 3  and R 4  which may be the same or different are each a hydrogen atom, an alkyl group, an alkoxyalkyl group, an aralkyl group or an aryl group. 
     
     
       5. A dye solution according to claim 4 containing 10 -1  to 10 -4  mols of the perimidone dye per liter.